M.I.O. stands for Made In Oregon and this glass company is proud of its American roots. M.I.O. has years of blowing thick, artistic water pipes, using the best starting materials, and lab grade glass tubing made in Germany by Schott Glass Company. Most of their glass water pipes use 5mm or 9mm thick tubing, so if you’re looking for a thick heavy duty water pipe, M.I.O. has you covered. They just don’t play around when it comes to quality, they actually care!